One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(3,10)(4,13)(5,9)(11,12)(15,16)(17,18)(19,27)(20,32)(21,35)(22,26)(23,30)(24,33)(25,28)(29,43)(31,39)(34,46)(36,41)(37,45)(38,42)(40,44)(47,48) involution — undirected(1,2,5,7,6,4,9,13)(3,8,11,15,12,14,10,16)(17,19,28,41,22,31,21,30)(18,23,35,39,26,36,25,27)(20,29,42,48,34,45,33,44)(24,37,46,47,38,43,32,40)(1,3,6,12)(2,8,4,14)(5,11,9,10)(7,15,13,16)(23,36)(27,39)(37,43)(40,47)(1,4,5,13,6,2,9,7)(3,8,11,15,12,14,10,16)(17,20,21,33,22,34,28,42)(18,24,25,32,26,38,35,46)(19,29,30,44,31,45,41,48)(23,37,27,40,36,43,39,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.